I know I can't be the only one here who's nuts about 'em.
There's one crazy ride at Six Flags Great Adventure called Kingda Ka. Launches you from the station at 128 miles per hour in 3.5 seconds, 456 feet into the air (over 40 stories) at a 90º angle, and you glide back into the station 30 seconds after launch. Rode it 7 times this season. Not my absolute favorite, but a thoroughly enjoyed one.
What's your poison?